the answer is -$97 for sure.
) _0 \+ v2 l+ C) c* m5.39.217.77:8898Think about it this way
' {0 }/ ]9 i" ]+ L6 m% j1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
+ O+ [& \; y- u+ r" G k- n, D) q$ {tvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can think this as a lost of $100. therefore the overall gain is $3-$100 = -$97 |
發表於 2007-5-16 03:12 AM
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發表於 2007-5-19 03:21 PM
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發表於 2007-5-21 03:49 AM
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